AnonHxy commented on code in PR #18293:
URL: https://github.com/apache/pulsar/pull/18293#discussion_r1016094348
##########
pulsar-broker/src/test/java/org/apache/pulsar/broker/service/schema/SchemaServiceTest.java:
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@@ -154,6 +168,18 @@ public void writeReadBackDeleteSchemaEntry() throws
Exception {
assertNull(schemaRegistryService.getSchema(schemaId1).get());
}
+ @Test
+ public void testConcurrentPutSchema() throws Exception {
+ String schemaId = "tenant/ns/topic_test_concurrent_put_schema" +
UUID.randomUUID();
+ CompletableFuture.allOf(
+ putSchema(schemaId, schemaData1),
+ putSchema(schemaId, schemaData1),
+ putSchema(schemaId, schemaData1),
+ putSchema(schemaId, schemaData1))
+ .get();
+ assertEquals(getAllSchemas(schemaId).size(), 1);
Review Comment:
IIUC, the first put schema request will success ,and the second request
will fail with `BadVersionException`. Then the second request will retry call
`putSchemaIfAbsent`, result with `schema is already exists`. That's OK.
But I have a minor question, the second request will also create some
ledgers, which will never be used again, will this PR try to delete the unused
ledgers？
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